高电压技术2025，Vol.51Issue(2)：605-618,中插16-中插17,16.DOI:10.13336/j.1003-6520.hve.20240392
适用于直流汇集型风电场送出系统的双极DC/DC变换器及其短路限流
Bipolar DC/DC Converter and Short-circuit Current Limitation for DC-integrated Wind Farm Transmission System
摘要
Abstract
DC-integrated wind farm provides a feasible solution for new energy transmission in the"Shagoe Wilderness".However,its core equipment,DC converter,needs to break through the technical bottlenecks of low power and limited voltage.In order to overcome the above problems and achieve the interconnection of pseudo-bipolar DC pooling system and true bipolar DC sending system,a bipolar DC converter with short-circuit current limiting capability is proposed.Firstly,the topological operation principle and parameter design method of the proposed converter are analyzed,the matching control and modulation methods are proposed,and then the fault current blocking process of this converter is investigated.Finally,the feasibility of the topology and control strategy of the proposed reverse-resistance self-levelling modular multilevel dc-dc converter is verified by building a model with MATLAB/Simulink software.The results show that the proposed bipolar DC converter is able to match the difference in the operating modes between the two ends of the pseudo-bipolar wind farm and the true bipolar transmission line,and can quickly block the fault current.关键词
直流汇集风电场/两级升压并联/模块化多电平直流变换器/单双极转换/故障自清除/短路电流限制Key words
DC-integrated wind farm/two-stage booster parallel type/modular multilevel DC converter/unipolar-bipolar conversion/fault self-clearing and self-leveling submodules/DC short-circuit current limiting引用本文复制引用
玄东旭,樊艳芳,侯俊杰,卢俊龙,孙瑶,李小龙..适用于直流汇集型风电场送出系统的双极DC/DC变换器及其短路限流[J].高电压技术,2025,51(2):605-618,中插16-中插17,16.基金项目
"天山英才"培养计划(2022TSYCLJ0019) （2022TSYCLJ0019）
国家重点研发计划(2021YFB1507000).Project supported by Tianshan Talent Training Program(2022TSYCLJ0019),National Key R&D Program of China(2021YFB1507000). （2021YFB1507000）
